Focusing device



April '22 1924.

c. E. GODLEY FOCUSING DEVICE Filed March 16 1923 Patented Apr. 22 1924.

UNITED STATES LPATENT OFFICE.

CHARLES E. GODLEY, 0F DETROIT, MICHIGAN, ASSIGNOR TO EDMUNDS AND JONES CORPORATION, OF DETROIT, MICHIGAN, A CORPORATION OF NEW' YORK.

FOCUSING DEVICE.

Application filed March 16, 1923. Serial No. 625,465.

To all whom it may concern:

Be it known that I, CHARLES E. GODLEY,

a citizen of the United States, and residing at Detroit, in the county of Wayne and State of Michigan, have invented a new and Improved Focusing Device, of which the following is a specification.

This invention relates to means for adjustably supporting an electric light bulb in a reflector, and its object is to provide an adjustable mounting of this character which shall be simple in construction, which ma be disassembled when desired,.and whic can be produced at low cost.

Thisv invention consists in a cup-shaped member attached to the outer surfaceof a reflector, a connector sleeve, a spherical clamp adapted to grip the connector tube, and a circular coil spring within the cup to cause the spherical clamp to grip the connector sleeve. This invention further consists in the details of construction illustrated in the accompanyingdrawing and particularly pointed out in the claims;

In the accompanying drawing, Fig. 1 is a longitudinal section of a reflector with this improved focusing device attached to it. Fig. 2 is an end elevation 'of' a spherical clamp.

In the drawing, the reflector 1 is of any desired type and has an opening to receive the inner end 2 of the cup-shaped member 3, this end 2- being preferably secured to the reflector by reducing it and then rolling down its outer edge. A ring 4 is secured over the outer end of the cup 3 and has an inwardly turned flange 5.

The tubular'connector 6 is of standard size and cons'tructionand receives the conductor 7 at one end and the base 8 of the light bulb 9 at the other. Mounted on this sleeve is a spherical clamp 12 consisting of tween the clarnp and flange and thus not only causes the clamp to grip the connector sleeve but also forces it into the reduced end of the cup 3, thus causing the reduced end of this cup to also press the clamp onto the connector tube. But the clamp can also slide around on the spring and the connector sleeve and the bulb it supports may therefore be shifted as desired.

I prefer to leave the opening in theflange 5 sufiiciently large to permit the parts of the spherical clamp to be forced in or out, and this is sufficient to permit the spring 10 to be removed or inserted. It is evident that the configuration of this cup 3 may be changed as desired'so long as the flange to support the spring 10 is provided.

* The tension of the spring and the grip ofthe'clamp are sufficient to hold the 00111 hector sleeve and light bulb in position and I still permit the clamp to be turned in any desired direction and the connector sleeve to be slid longitudinally to vary the position of the bulb.

I claim- 1. A focusing device for electric light bulbs consisting of a cup-shaped member attached to a reflector, and having an inwardly extending flange at its'outer end, a connector sleeve within said cup-shaped member, a sectional spherical clamp within the cup-shaped member and surrounding the connector sleeve, and an endless circular coil spring Within the cup-shaped member and engaging the flange at the end thereof and said spherical clamp to cause the clamp to grip the connector sleeve.

2. A focusing device for electric light bulbs consisting of a cup-shaped member attached to a reflector, a connector sleeve within the cup-shaped member, a circumferential clamp Within the cup-shaped member and surrounding the connector sleeve,

and a tension member extending around the bulbs consisting of a cup-shaped member attached to a reflector and having an inwardly extending flange at its outer end, a connector sleeve loose within said cup-shaped/ member, a split circumferential clamping device mounted on "the sleeve and of smaller external diameter than the diameter of the inner edge of said flange so that the sleeye and clamping device thereon maypass into and out of said cup-shapedmember, and an annular coil spring within the cup-shaped member surrounding and gripping the clamping device-and held in fiosition -by "CHARLES 'E. GODLEY. 

